Most skilled tradespeople tend to quote jobs based on the square metre of the area which is to be worked on. For a decorating, tiling, plastering or rendering job you’ll need to calculate the area of the wall. Working out the square metres of a room may seem complicated but it’s actually quite simple and in this guide we will break down the process step by step.
Step one – Measure the height of the room
Measure the height of the wall from floor to ceiling. The average ceiling height of a house in the UK is 2.4 metres.
Step two – Measure the two walls
In this example the length is 3.15 metres and the width is 1.95 metres, if we assume that the opposite walls are the same we can times the number by two. Take a look underneath.
- Length is 6.3 metres (3.15 x 2)
- Width is 3.9 metres (1.95 x2)
- Add them both up (6.3 + 3.9) which equals 10.2
Now we need to multiple the height which we worked out first by the 10.2 we just worked out above.
- 2.4 x 10.2 = 24.48m2
So now we know the room is 24.5m2 (rounding up for ease) we can now factor in any openings in the room like doors & windows or just any space where we obviously can't plaster or tile like bath space. Which leads us nicely to step 3.
Step three – Calculate the individual space for any openings
Using the same technique we used above we need to measure the height & width of the door & windows.
Door – 0.8 metres wide by 2 metres high
- 0.8 x 2 = 1.6m2
Window 1 – 0.9 metres wide by 1.5 metres high
- 0.9 x 1.5 = 1.35m2
Window 2 – 1.5 metres wide by 1.5 metres high
- 1.2 x 1.5 = 1.8m2
Step four – Subtract opening measurements from total wall space
24.5m2 – 1.6m2 – 1.35m2 – 1.8m2 = 19.75m2
By subtracting the opening from the total wall measurement we calculated earlier, we are left with a room meterage size of 20m2 (rounding up).
It’s really that simple, you now know how to work out square metres of a room. Give this measurement to your ProjectStack expert if you want to hire a talented skilled worker for your job.
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